Atom-only theories for U(1) symmetric cavity-QED models
Roberta Palacino, Jonathan Keeling
Abstract
The authors show that the standards methods to eliminate degrees of freedom in many-body quantum systems fail when considering a model with U(1) symmetry, and propose a fix involving a diagrammatic approach.
Topics & Concepts
Diagrammatic reasoningDegrees of freedom (physics and chemistry)QuantumMathematicsTheoretical physicsComputer scienceQuantum systemPhysicsCausality (physics)Action (physics)Quantum field theoryAlgebra over a fieldQuantum and electron transport phenomenaCold Atom Physics and Bose-Einstein CondensatesQuantum chaos and dynamical systems